Throttle device
AssigneeMikuni Corporation
InventorIsamu TANAKA
Life of this patent
Estimating the term…
Abstract
Provided is a throttle device including a total of two throttle units in two cylinders in an engine, each of the throttle units having a throttle shaft, throttle valves, and a motor driving and rotating the throttle shaft, in which a return spring provided in a first throttle unit and a return spring provided in a second throttle unit out of the two throttle units are components of the same type and have mutually different installation forms in the throttle units such that biasing torques at the same degree of opening of the throttle valves differ from each other, thereby enabling performances of responding to a change in rotation speed to be different from each other.
Claims13
A throttle device comprising:
- a plurality of throttle units provided in an engine for each of cylinders or for each of cylinder groups, each of the throttle units including
- a throttle body having intake air passages corresponding to the plurality of cylinders of the engine,
- a throttle shaft rotatably supported by the throttle body,
- throttle valves secured to the throttle shaft to open and close the intake air passages of the cylinders,
- a motor driving and rotating the throttle shaft, and
- a biasing portion biasing the throttle shaft to cause the throttle valves to have a first predetermined degree of opening,
- wherein a biasing torque of the biasing portion provided in a first throttle unit and a biasing torque of the biasing portion provided in a second throttle unit out of the plurality of throttle units are different from each other at a same degree of opening of the throttle valves.
Dependencies are inferred from the claim text.